Razor



2- c. M. JOHNSON ETAL 2,270,300

RAZOR Filed Jan. 15. 1938 l* 6 INVENTORS Patented Jan. 20, 1 942 OFFICERAZOR.

Corydon M. Johnson and Howeth V.

Frceport, N. Y. I

Marshall, 2

Application January 15, 1938, Serial No. 185,203

Claims.

- to be .described are adaptable in many types of cutlery devices, suchas lawn mowers, sheet metal proillers, mowing machines, harvesters,textile shearers and the like, the same for purposes of illustration,will be described in particularity as applied to an electric motoroperated razor.

. and motor.

Among the'improvements and differentiating vision of a hinged cutterhead to. receive a hollow removable stator cutter and an interchangeableand reversible full rotating rotor cutter with spiral blades and alighting means carried by the compact casing and adapted to be lightedby the same electrical source that drives the electric motor foroperating the rotor cutter.

The details of the invention will become more apparent from thefollowing specification and appended, claims, certain embodimentsthereof being illustrated in the accompanying drawing, in which:

Figure 1 is a view in side elevation of the electric motor driven razor,showing an illuminating lamp lighted.

Figure 2 is a top plan view of the same partly broken away.

Figure 3 is an enlarged view in side elevation, of the same, partly inlongitudinal section to show the motor driven rotor cutter anditsrelationship with the stator cutter, together with- Figure 6 is aview in cross section of the rotor cutter taken along line 6-! of Figure5.

Referring more. particularly to the drawing, the housing shown in Figs.1 and 3 is made in convenient. hand grip form, particularly by the bowedinclined under surface 2. On either side of the housing is a lamp casingl to receive a lamp 4 to provide a shadow eliminating light so as toprovide .a means for illuminating the surface to be shaven. The cutterhead I is of the hinged type, the same being hinged at 8 and providedwith a spring clamp I. The outer stator into the razor, which isprovided with any suit able electrically driven motor, and which may beplugged into a suitable socket from which to obtain electric power. Asuitable switch li may be used for starting or stopping the motor andfor lighting and turning off the lights, or separate switches may beemployed for the lamps As shown-in one modification in Fig. 3 the razoris in assembled position. Within the head 5 is rotatably mounted a pilotshaft II which is maintained in position by asuitabl retainer pin l2.The pilot shaft includes a bevelled drive face l3 which cooperates witha corresponding bevelled tip it of the electric motor shaft i5 so as tobe rotated thereby. The pilot shaft also has a rotatable self-centeringball end l8 and driving arms i1 fitting 1within grooves in the rotor.cutter l8 for rotating the rotor cutter.

One end of the head is provided with an adjustable spring I secured atone end by a set screw 19, the spring carrying at its other end arotatable self-centering semispherical bearing 20, adapted to fit withina depression in the body of the rotor cutter l8. Thus with the switch i!turned on the rotor cutter "I8 is rotated within and in close andpredetermined relation to the outer stator cutter 8.

The rotor cutter is removable, interchangeable and reversible, by merelyhinging outwardly the stator cutter which automatically pressesdownwardly on the spring 1 until the ball 20 clears the depression inthe rotor cutter, until the head is swung about the hinge 6. Then therotor may be removed, replaced, changed or reversed and the head thenreassembled. Forlubricating purposes there is an oiling wick 2| with oilducts 22 and 23 leading to the rotor cutter and a felt seal 26 and oilducts 24 and 25 leading to the motor shaft l5 rotating within its sleeve21.

" As stated before, the cylindrical rotor and stator cutters are hollow.The stator cutter 8 is slotted at 28. The fully rotating rotor cutter.has a cutting edge comprising one or more spiral threads 29. The spiralthreads approach and pass the cutting edge of the stator cutter, I at acritical shearing angle at all times in one or more points along theshearing area of the stator-cutter. The arrangement of the parts is suchthat. it provides for the maintenance of a small predetermined clearancebetween. the spiral rotor cutter and the statorcutter so as to maintainmaximum shearing-efllciency.

The cylindrical stator cutter is 'hollowed out cutter is shown at I. Thelead wires 9 extend on an axis parallel with the axis of the inside onthe diameter of and at rightangles to the diameter bisecting both axes.

From the foregoing it will be seen that there has been provided acompact self-contained electric motor driven shearing device which:carries its own illumination; has removable and replaceable statorcutters; removable, interchangeable and reversible rotor cutters; ahinged head with spring clamping means; self-centering bearings for thecutters to prevent misalignment and to allow the same to be floating toreduce wear and 'noise; a full rotating rotor cutter with predeterminedspiral cutting edges to effect efllcient a,:a70,s0o

I which said head may be swung into and out of operative position andsaid rotor cutter into and out of driven relationship with said drivingshaft.

3. In a shearing device employing a hollow stator cutter and a hollowrotor cutter removably mounted therein, a shaft for driving said rotorcutter, said device comprising a hinged head including said statorcutter and a hinge disposed at right angles to the axes of said cuttersby which said head may be swung into and out of operative position andsaid rotor cutter into and out of driven relationship with saiddrivingshai't and adjustable self-centering means for maintaining saidcutters in predetermined aligned position.

4. In a shearing device employing a hollow stator cutter and a hollowrotor cutter removably mounted therein, a shaft for driving said rotorcutter, said device comprising a hinged head including said statorcutter and a hinge disposedat right angles to the axes of said cutters"by shearing and a reservoir '30 for the matter sheared.

We claim:

1. 'In a shearing device employing a hollow stator cutter and a hollowrotor cutter therein, a shaft fordrivlng said rotor cutter, said devicecomprising a hinged head in which said rotor cutter is removablymounted, said hinged head including a hinge disposed at right angles tothe axes of said cutters by which said head may be swung into and out ofoperative position and said rotor into and out of driven relationshipwith said driving shaft. e

2. In a shearing device employing a hollow stator cutter and a hollowrotor cutter removably mounted therein, a shaft for driving said rotorcutter, said device comprising a hinged head including said statorcutter and a hinge disposed at right angles to the axes of said cuttersby which said head may be swung into and out of operative position andsaid rotor cutter into and out of driven relationship with said drivingshaft and resiliently urged adjustable self-centering means formaintaining said cutters in predetermined aligned position.

5. In a shearing device employing a hollow stator cutter and a hollowrotor cutter removably mounted therein, a shaft for driving said rotorcutter, said device comprising a hinged head including said statorcutter and a hinge disposed at right angles to the axes of said cuttersby which said head may be swung into and out of operative position andsaid rotor cutter intoand out of driven relationship with said drivingshaft and self-centering hemispherical bearing means,

one of which is resiliently urged by adjustable resilient means formaintaining said cutters in predetermined aligned position.

common M. JOHNSON. HOWE'I'H V..MARSHALL,

